Your camera has Minolta AF mount, which is the precursor to Sony A-mount. As others have already noted, which adapter may work depends on the specific lens you have.
Consider getting a lens designed specifically for your camera, such as Minolta AF 70-210/4 or 80-200/2.8. These lenses have constant aperture, excellent optics, and can be controlled and auto-focused by your camera. The 70-210/4 is fairly inexpensive and can be purchased for prices similar to that of some of the better adapters.
Vivitar rebranded lenses made by other manufacturers. The "same" lens was usually made for multiple mounts. Unless your lens uses M42, T2, or TX mounts, I would not bother adapting it to Minolta AF mount.
The problem with adapting to Minolta AF is the flange focal distance (44.5mm) is just long enough to make it impractical for most optics-free adapters to maintain infinity focus. If you are willing to use the lens only for close-up photography, you can use optics-free "macro" adapters that will not maintain infinity focus:
- Canon FD
- Pentax PK
- Minolta MD
- Nikon F
- Olympus OM
- Possibly others.
For many of the same mounts, there are also adapters that contain optics that maintain infinity focus, but multiply the focal length by 1.4x, so your 70-210mm lens would become a 98-294mm lens. The multiplier also decreases the amount of light used for exposure, so the lens would be less useful in low light.